For most of the twentieth century, "Texas energy" meant one thing: hydrocarbons. The state still produces more oil and natural gas than any other, and those industries remain central to its economy. But over the past two decades a second energy story has taken hold — and on the electric grid, it is now the faster-growing one. Texas leads the United States in installed wind capacity, has moved into first place for new utility-scale solar, and on windy, sunny days routinely meets a large share of its electricity demand from renewables alone.
The reasons are mostly physical. Texas is big, open, sunny, and — across its western half — exceptionally windy. It also controls its own electric grid, which makes building new generation faster here than almost anywhere else in the country.
Wind: from novelty to backbone
The Texas wind boom began on the High Plains and the Trans-Pecos, where steady wind blows across cheap, open land. State policy in the early 2000s — a renewable goal and, crucially, billions of dollars of new transmission lines built to carry West Texas wind to the cities — turned a scattering of turbines into the largest wind fleet in the nation. Texas now hosts roughly 40,000 megawatts of installed wind capacity, more than any other U.S. state and more than all but a handful of entire countries.
Wind alone supplies on the order of a quarter of the electricity on the state's main grid in a typical year, and far more than that during strong overnight wind events.
Solar: the faster climber
Solar arrived later but is growing faster. Abundant sunshine across West and South Texas, falling panel costs, and the same fast permitting that helped wind have made Texas the country's leader in new utility-scale solar construction. Solar's daily rhythm also complements wind: it peaks in the afternoon heat, exactly when air-conditioning demand strains the grid, while wind tends to pick up at night.
Approximate share of electricity generated on the ERCOT grid by source in a recent year. Wind and solar together now rival coal and nuclear combined. Figures vary year to year with weather and fuel prices.
A resource far larger than the demand
What makes Texas remarkable is not what it has built but what it could. Federal laboratory assessments consistently rank Texas at or near the top of the nation for both wind and solar technical potential. Add the two together across the state's enormous land area, and the accessible renewable resource is not just larger than what Texas has installed — it is many times larger than everything the state consumes.
Texas's combined technical wind and solar potential exceeds the state's own electricity demand by a wide margin — the constraint is transmission, storage and markets, not sunlight or wind.
That gap between potential and use is the central fact of renewable energy in Texas. The wind and the sun are not the limiting factors. The limits are the wires to move power from empty country to crowded cities, the batteries and other storage to hold it until it is needed, and the market and policy choices that decide how fast all of it gets built.
The grid that makes it possible — and fragile
Most of Texas runs on its own electric grid, managed by the Electric Reliability Council of Texas (ERCOT) and largely separate from the rest of the country. That independence is why Texas can add generation so quickly. It is also why the grid is more exposed when extreme weather hits: with few large connections to neighboring grids, Texas cannot easily import power in a crisis, as the deadly winter storm of February 2021 made clear.
Battery storage is now the fastest-growing piece of the system, smoothing the daily swing of solar and the gustiness of wind. How quickly storage and transmission expand will determine how much further renewables can go.
The bottom line
Texas is, improbably, both the nation's leading fossil-fuel producer and its leading builder of renewable power. The two are not as contradictory as they sound: the same things that made Texas an energy state — land, capital, light regulation, and a hunger for power — now drive its wind and solar. The open question is no longer whether renewables belong in Texas. It is how fast the grid around them can grow.
Sources & further reading
- U.S. Energy Information Administration, Texas State Energy Profile and electric power data.
- Electric Reliability Council of Texas (ERCOT), fuel-mix and capacity reports.
- National Renewable Energy Laboratory (NREL), wind and solar technical-potential assessments.
- American Clean Power Association, state wind and solar capacity rankings.